Question about Yamaha XT 125 R Motorcycles
I have cleaned my carb but now the problem is it will only start when the choke is on and when I turn it off the bike cuts out so I'm thinking its the air/fuel mixture but I don't know which screw it is I know which one is the idle
Hi, Tom for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere zero $0 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
Location of air fuel mixture screw on Yamaha xt 125 Google Search
Yamaha XT125 Carb Tips Mikuni 3D6
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Posted on Feb 01, 2017
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Posted on Jan 02, 2017
There have an air leak between the carb and the cylinder and/or the head and cylinder. Old hard / cracked rubber fittings and O rings are usually the problem. When extra air gets into the system it leans the fuel mix and the high idle is the result. It also means the engine runs hotter. Also, cracked or broken reeds can be a source.
Posted on Aug 10, 2009
Sounds like a vacuum leak is leaning out the mixture....check the intake between carb and engine for leaks...another source may be tjhe crankcase seals are leaking.
Posted on Mar 31, 2011
SOURCE: what is the standard air
Hi, You have a closed mainjet (need cleaning) as for idling you must screw in all the way and then unscrew 2 turns (that's a standart) and then you only have to do minor adjustments.
As for the needle position they all work the highest grove you set the more fuel to your engine. Start from the lowest, test the bike for power and rpm's and adjust from there
Posted on Sep 16, 2011
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